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Article: On the influence of inter-particle friction and dilatancy in granular materials: a numerical analysis

TitleOn the influence of inter-particle friction and dilatancy in granular materials: a numerical analysis
Authors
Issue Date2012
Citation
Granular Matter, 2012, v. 14 n. 3, p. 433-447 How to Cite?
AbstractMechanical behavior of granular soils is a classic research realm but still yet not completely understood as it can be influenced by a large number of factors, including confining pressure, soil density, loading conditions, and anisotropy of soil etc. Traditionally granular materials are macroscopically regarded as continua and their particulate and discrete nature has not been thoroughly considered although many researches indicate the macro mechanical behavior closely depends on the micro-scale characteristics of particles. This paper presents a DEM (discrete element method)-based micromechanical investigation of inter-particle friction effects on the behavior of granular materials. In this study, biaxial DEM simulations are carried out under both 'drained' and 'undrained' (constant volume) conditions. The numerical experiments employ samples having similar initial isotropic fabric and density, and the same confining pressure, but with different inter-particle friction coefficient. Test results show that the inter-particle friction has a substantial effect on the stress-strain curve, peak strength and dilatancy characteristics of the granular assembly. Clearly, it is noted that apart from the inter-particle friction, the shear resistance is also contributed to the dilation and the particle packing and arrangements. The corresponding microstructure evolutions and variations in contact properties in the particulate level are also elaborated, to interpret the origin of the different macro-scale response due to variations in the inter-particle friction. © Springer-Verlag 2012.
Persistent Identifierhttp://hdl.handle.net/10722/163820
ISSN
2015 Impact Factor: 1.74
2015 SCImago Journal Rankings: 1.033
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, Zen_US
dc.contributor.authorYang, Jen_US
dc.contributor.authorWang, Len_US
dc.date.accessioned2012-09-20T07:52:19Z-
dc.date.available2012-09-20T07:52:19Z-
dc.date.issued2012en_US
dc.identifier.citationGranular Matter, 2012, v. 14 n. 3, p. 433-447en_US
dc.identifier.issn14345021-
dc.identifier.urihttp://hdl.handle.net/10722/163820-
dc.description.abstractMechanical behavior of granular soils is a classic research realm but still yet not completely understood as it can be influenced by a large number of factors, including confining pressure, soil density, loading conditions, and anisotropy of soil etc. Traditionally granular materials are macroscopically regarded as continua and their particulate and discrete nature has not been thoroughly considered although many researches indicate the macro mechanical behavior closely depends on the micro-scale characteristics of particles. This paper presents a DEM (discrete element method)-based micromechanical investigation of inter-particle friction effects on the behavior of granular materials. In this study, biaxial DEM simulations are carried out under both 'drained' and 'undrained' (constant volume) conditions. The numerical experiments employ samples having similar initial isotropic fabric and density, and the same confining pressure, but with different inter-particle friction coefficient. Test results show that the inter-particle friction has a substantial effect on the stress-strain curve, peak strength and dilatancy characteristics of the granular assembly. Clearly, it is noted that apart from the inter-particle friction, the shear resistance is also contributed to the dilation and the particle packing and arrangements. The corresponding microstructure evolutions and variations in contact properties in the particulate level are also elaborated, to interpret the origin of the different macro-scale response due to variations in the inter-particle friction. © Springer-Verlag 2012.-
dc.languageengen_US
dc.relation.ispartofGranular Matteren_US
dc.titleOn the influence of inter-particle friction and dilatancy in granular materials: a numerical analysisen_US
dc.typeArticleen_US
dc.identifier.emailYang, J: junyang@hkucc.hku.hken_US
dc.identifier.authorityYang, J=rp00201en_US
dc.identifier.doi10.1007/s10035-012-0348-x-
dc.identifier.scopuseid_2-s2.0-84861231585-
dc.identifier.hkuros206030en_US
dc.identifier.hkuros221223-
dc.identifier.volume14en_US
dc.identifier.issue3en_US
dc.identifier.spage433en_US
dc.identifier.epage447en_US
dc.identifier.isiWOS:000303881800011-

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